Electronic safety clutch with composite roller

Abstract

The application relates to an electronic safety clamp with a composite roller and relates to the technical field of elevator components. The electronic safety clamp with the composite roller comprises a composite roller and a safety clamp body; the cylindrical surface of the composite roller is in contact with the inner surface of the safety clamp body; when the electronic safety clamp is locked and relative motion is generated between the electronic safety clamp and an elevator car, the composite roller is used for generating contact with an elevator guide rail based on the motion state of the elevator; the composite roller comprises a metal layer and a non-metal layer; the outer surface of the non-metal layer is made of high-strength plastic; and the outer surface of the metal layer is made of metal. When the electronic safety clamp is normally powered off and locked or the elevator car sinks due to some normal use conditions, the non-metal surface of the composite roller can be in contact with the elevator guide rail, so that the locking phenomenon between the composite roller and the elevator guide rail is prevented during normal use, the normal use of the roller is ensured, and the safety and use stability of the electronic safety clamp configured by the household elevator car are ensured.

Description

Technical Field

[0001] This invention relates to the field of elevator component technology, and in particular to an electronic safety clamp with composite rollers. Background Technology

[0002] As a new elevator safety component, the electronic safety clamp is rapidly expanding its application scenarios and has become an essential option in home elevator configurations.

[0003] However, the application of electronic safety brakes differs greatly from that of traditional safety brakes, leading to many unexpected situations during initial application. As a direct-pull electronic safety brake, it also faces a practical challenge: situations where people can enter the car after a power outage; and situations where people in the car are engaged in unpredictable behavior after a sudden power outage. Both of these scenarios can cause the car to settle.

[0004] In related technologies, when the car settles, the safety clamps are prone to jamming and cannot reset themselves after power is restored, causing some inconvenience in actual use. Summary of the Invention

[0005] This invention relates to an electronic safety clamp with composite rollers, which, through the design of the end-face material, can prevent accidental locking of the safety clamp during normal elevator use. The electronic safety clamp with composite rollers includes composite rollers and a safety clamp body; The cylindrical surface of the composite roller contacts the inner surface of the safety clamp body; When the electronic safety clamp locks and moves relative to the elevator car, the composite rollers are used to make contact with the elevator guide rails based on the elevator's motion state. The composite roller consists of a metal layer and a non-metal layer. The outer surface material of the non-metal layer is high-strength plastic, and the outer surface material of the metal layer is metal. When the stress on the non-metallic layer is less than the stress threshold, the outer diameter of the non-metallic layer is greater than the outer diameter of the metallic layer. When the stress on the non-metallic layer exceeds the stress threshold, the outer diameter of the non-metallic layer is smaller than the outer diameter of the metallic layer. When the elevator descends at its initial speed, the non-metallic layer of the composite rollers comes into contact with the elevator guide rails. When the elevator descends at the second speed, the metal layer of the composite rollers comes into contact with the elevator guide rails, and the second speed is greater than the first speed.

[0006] In one alternative embodiment, the inner surface of the safety clamp body has a groove; Composite rollers fit into grooves; When the composite roller is displaced relative to the safety clamp body, the composite roller moves along the groove.

[0007] In an alternative embodiment, a non-metallic layer is located at the end of the composite roller; The metal layer is located in the center of the composite roller.

[0008] In one optional embodiment, the number of non-metallic layers is two; Two non-metallic layers are located at the two ends of the composite roller.

[0009] In an optional embodiment, the composite roller further includes a sandwich layer; The ply plate layer is used to contact the safety clamp body; The top surface of the plywood layer is designed as the contact surface between the composite roller and the safety clamp body.

[0010] In an alternative embodiment, a non-metallic layer is located between the sandwich layer and the metallic layer.

[0011] In an optional embodiment, the electronic safety clamp further includes a limiting mechanism for limiting the composite roller.

[0012] In an alternative embodiment, the limiting mechanism is implemented as a lifting rod; One end of the lifting rod is fixedly connected to the composite roller; The lifting rod is used to drive the composite rollers.

[0013] In one alternative embodiment, the non-metallic surface of the roller is made of one of polyoxymethylene, polyetheretherketone, and polytetrafluoroethylene.

[0014] The technical effects included in the various embodiments of the present invention include at least the following: When the electronic safety clamp is working normally, or when the elevator car sinks due to normal use, the non-metallic surface of the composite roller can contact the elevator guide rail to form slippage, which prevents the composite roller from locking up with the elevator guide rail during normal use. This ensures the normal use of the roller and guarantees the safety and stability of the electronic safety clamp configured in the home elevator car. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of an electronic safety clamp structure with composite rollers provided in an exemplary embodiment of this application is shown.

[0017] Figure 2The illustration shows a front view schematic diagram of an electronic safety clamp with composite rollers provided in an exemplary embodiment of this application.

[0018] Figure 3 A schematic diagram of a composite roller provided in an exemplary embodiment of this application is shown.

[0019] Figure 4 This illustration shows a side view of a composite roller in a stationary state, provided by an exemplary embodiment of this application.

[0020] Figure 5 This illustration shows a structural schematic diagram of an electronic safety clamp with a lifting lever provided in an exemplary embodiment of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] Figure 1 A schematic diagram of the structure of an electronic safety clamp provided in an exemplary embodiment of this application is shown. Figure 2 It shows the relationship with Figure 1 The corresponding front view diagram of the electronic safety clamp. Figure 3 A schematic diagram of a composite roller provided in an exemplary embodiment of this application is shown. Please refer to... Figures 1 to 3 The electronic safety clamp with composite rollers includes a composite roller 1 and an electronic safety clamp body 2. The cylindrical surface of the composite roller 1 contacts the inner surface of the safety clamp body 2. When the electronic safety clamp is locked and relative to the elevator car, the composite roller 1 contacts the elevator guide rail based on the elevator's motion state. The composite roller 1 includes a metal layer 11 and a non-metallic layer 12. The outer surface of the non-metallic layer 12 is made of high-strength plastic, and the outer surface of the metal layer 11 is made of metal. When the stress on the non-metallic layer 12 is less than the stress threshold, the outer diameter of the non-metallic layer 12 is greater than the outer diameter of the metal layer 11; when the stress on the non-metallic layer 12 is greater than the stress threshold, the outer diameter of the non-metallic layer 12 is less than the outer diameter of the metal layer 11. When the elevator descends at a first speed, the non-metallic layer 12 of the composite roller 1 contacts the elevator guide rail 3; when the elevator descends at a second speed, the metal layer 12 of the composite roller 1 contacts the elevator guide rail 3, and the second speed is greater than the first speed.

[0023] Optionally, in the embodiments of this application, the relative movement between the elevator car and the electronic safety clamp is that the elevator car moves downward relative to the electronic safety clamp.

[0024] In practical applications, the electronic safety clamp is installed around the elevator guide rails, without contacting the clamp itself. It activates when the elevator car accelerates downwards, causing the rollers within the clamp to contact the guide rails and generate friction, thus achieving safe braking of the elevator car. In this application, the safe braking of the elevator car is achieved through a metal layer on the composite rollers.

[0025] In home elevator applications, there are instances of brief, low-acceleration descents due to normal use, and longer, high-acceleration descents due to elevator malfunctions. In these situations, the metal and non-metal layers of the composite rollers will each play their respective roles.

[0026] In this embodiment, the composite roller is configured to be movably connected to the safety clamp body or to be able to move relative to the safety clamp body along a preset trajectory in the safety clamp body by means of a limiting member or limiting mechanism.

[0027] In the embodiments of this application, please refer to Figure 3 The composite roller can be implemented as a multi-layered cylindrical component, connected by a unified opening and bolted fastening. Therefore, the composite roller includes both metal and non-metal layers. The metal layer must have at least a metallic outer surface material, and the non-metal layer must have at least a non-metallic outer surface material. In other embodiments of this application, the composite roller can be a single-piece molded part; this application does not limit the actual internal structure of the composite roller.

[0028] Figure 4 This diagram shows a side view of a composite roller in a static state, according to an exemplary embodiment of this application. Please refer to... Figure 4 The outer diameters of the metal layer 11 and the non-metal layer 12 of the composite roller 2 differ in a static state. The outer diameter of the non-metal layer 12 is larger than that of the metal layer 11. In actual use, the non-metal layer 12 will not deform under low stress, and its outer surface is the side that directly contacts the elevator guide rail; when the non-metal layer 12 is subjected to high stress, it will deform, at which point the metal layer 11 will directly rub against the elevator guide rail. It should be noted that... Figure 4 The difference in outer diameter between the non-metallic layer 12 and the metallic layer 11 is illustrated in an enlarged manner. In one example of practical application, the outer diameter of the non-metallic layer is 0.2-0.3 mm larger than that of the metallic layer.

[0029] In this embodiment, the outer surface material of the metal layer can be 20CrMnMo. Correspondingly, the outer surface material of the non-metal layer is a high-strength plastic material with elasticity.

[0030] In practical applications, when power is interrupted, the elevator car is stationary. The safety brake only exerts the tangential force of the spring release on the guide rail surface. The non-metallic layer in the composite rollers resists the deformation caused by the tangential force due to its own hardness. At this time, the surfaces acting are the guide rail surface and the side of the non-metallic layer. When the elevator car descends at inspection speed, the tangential force exerted by the car causes the side of the non-metallic layer to slip in the groove when it contacts the elevator guide rail, thus allowing the car to descend slowly. If the critical speed is exceeded, the non-metallic layer will be compressed and deformed, and the side of the metallic layer will press against the guide rail surface, stopping the car.

[0031] In summary, the electronic safety clamp with composite rollers provided in this application embodiment allows the non-metallic surface of the composite rollers to contact the elevator guide rails and slip when the electronic safety clamp is working normally or when the elevator car sinks due to some normal usage conditions. This prevents the composite rollers from locking up with the elevator guide rails during normal use, while ensuring the normal use of the rollers and guaranteeing the safety and stability of the electronic safety clamps configured in home elevator cars.

[0032] Next, other specific structures of the electronic safety clamp with composite rollers involved in the embodiments of this application will be described: In one alternative embodiment, please refer to Figure 1 The inner surface of the safety clamp body 2 has a groove 21; the composite roller 2 engages with the groove 21. When the composite roller and the safety clamp body are displaced, the composite roller moves along the groove 21.

[0033] By setting the grooves, the relative displacement between the composite roller and the safety clamp is restricted, thereby enabling the composite roller to reciprocate along the grooves.

[0034] In one optional embodiment, the non-metallic layer is located at the end of the composite roller; the metallic layer is located at the center of the composite roller. During the rapid movement of the elevator car exceeding the speed limit, the non-metallic layer at the end is deformed by strong stress compression, and the metallic layer at the center... In an alternative embodiment, such as Figure 3 As shown, there are two non-metallic layers. These two non-metallic layers are located at the two ends of the composite roller. That is, the composite roller is realized in an axisymmetric state.

[0035] In one alternative embodiment, please refer to Figure 3 The composite roller 1 also includes a clamping layer 13; the clamping layer 13 is used to contact the safety clamp body 1; the top surface of the clamping layer 13 serves as the contact surface between the composite roller 1 and the safety clamp body 2. Correspondingly, the non-metallic layer 12 is located between the clamping layer 13 and the metallic layer 11.

[0036] In an optional embodiment, the electronic safety clamp further includes a limiting mechanism for limiting the composite roller.

[0037] In one alternative embodiment, please refer to Figure 5 The limiting mechanism is implemented as a lifting rod 4; one end of the lifting rod 4 is fixedly connected to the composite roller 1; the lifting rod 4 is used to drive the composite roller 1.

[0038] In an optional embodiment, the non-metallic surface of the roller is made of one of polyoxymethylene, polyetheretherketone, and polytetrafluoroethylene. That is, the non-metallic materials in the above examples all have excellent mechanical, physical, chemical, and machinability properties, requiring high hardness, impact resistance, small deformation, high wear resistance, suitable temperature stability, suitable chemical stability, and excellent machinability.

[0039] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electronic safety clamp with composite rollers, characterized in that, The electronic safety clamp includes a composite roller and a safety clamp body; The cylindrical surface of the composite roller contacts the inner surface of the safety clamp body; When the electronic safety clamp locks and moves relative to the elevator car, the composite roller is used to make contact with the elevator guide rail based on the elevator's motion state. The composite roller includes a metal layer and a non-metal layer, wherein the non-metal layer is made of high-strength plastic and the metal layer is made of metal; When the stress on the non-metallic layer is less than the stress threshold, the outer diameter of the non-metallic layer is greater than the outer diameter of the metallic layer. When the stress on the non-metallic layer is greater than the stress threshold, the outer diameter of the non-metallic layer is smaller than the outer diameter of the metallic layer. When the elevator descends at a first speed, the non-metallic layer of the composite roller contacts the elevator guide rail; When the elevator descends at a second speed, the metal layer of the composite roller contacts the elevator guide rail, and the second speed is greater than the first speed; The inner surface of the safety clamp body has grooves; The composite roller mates with the groove; When the composite roller is displaced relative to the safety clamp body, the composite roller moves along the groove; The non-metallic layer is located at the end of the composite roller; The metal layer is located at the center of the composite roller; The number of non-metallic layers is two; The two non-metallic layers are located at the two ends of the composite roller, respectively.

2. The electronic safety clamp with composite rollers according to claim 1, characterized in that, The composite roller also includes a sandwich layer; The clamping layer is used to contact the safety clamp body; The top surface of the clamping layer is the contact surface between the composite roller and the safety clamp body.

3. The electronic safety clamp with composite rollers according to claim 2, characterized in that, The non-metallic layer is located between the sandwich layer and the metallic layer.

4. The electronic safety clamp with composite rollers according to claim 1, characterized in that, The electronic safety clamp also includes a limiting mechanism for limiting the position of the composite roller.

5. The electronic safety clamp with composite rollers according to claim 4, characterized in that, The limiting mechanism is a lifting rod; One end of the lifting rod is fixedly connected to the composite roller; The lifting rod is used to drive the composite roller.

6. The electronic safety clamp with composite rollers according to claim 1, characterized in that, The non-metallic surface of the composite roller is made of one of polyoxymethylene, polyetheretherketone, and polytetrafluoroethylene.

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